Join Date: Jul 2011
Location: Cologne, Germany
each headlight has its own ground: a small wire clipped under one of the headlight mounting screws...it is always troublesome and not a good solution, albeit factory!
(photo1), remove, clean, refit.
heater fan - test if it turns by sticking your fingers in the heater box vent, driver's side, above the pedals. If not too frozen you can sometimes get it turning again.
Check the heater wires have not been knocked off. (photo2)
Check power at those wires.
last but not least, send BB member 'Papajam' a PM with your email and model and he will send you a great colored wiring diagram for your spider.
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.